Preliminary investigations into the mineralogy and potential uses of the stilbite rich tuffs from Kratovo–Zletovo volcanic area, Republic of Macedonia

Blažev, Krsto and Sijakova-Ivanova, Tena and Panov, Zoran and Zajkova-Paneva, Vesna (2012) Preliminary investigations into the mineralogy and potential uses of the stilbite rich tuffs from Kratovo–Zletovo volcanic area, Republic of Macedonia. Comptes rendus de l’Acad´emie bulgare des Sciences, 65 (2). pp. 178-192. ISSN 1310-1331

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Abstract

This paper presents preliminary results of investigation of the stilbite (NaCa2Al5Si13O36 – 14H2O) rich tuffs from Rajcani and Kriva Krusa. In- vestigation tuffs are situated in the south part of the Kratovo–Zletovo volcanic district and they are a part of this big volcanic complex. No presence of zeolites in these tuffs is determined in all previous publications. In our investigation we found out that stilbite, about 57%, is presented in Rajcani deposit while in Kriva Krusa stilbite is presented by 27%. Cation exchange capacity (CEC) and ammonium exchange capacity (AEC) values for samples from Rajcani deposit are in the range of 69–82 meq/100 g for CECs and 71–87 meq/100 g for AECs. Kriva Krusa deposits are in the range of 94–102 meq/100 g for CECs and 109–114 meq/100 g for AECs. All the values show that these tuffs could be very effective in a wide range of applications such as waste water ammonium removal, in animal nutritions, fertilizers, fish farming, additives to cement and others. The preliminary results of this study warrant further characterization, because these zeolitic tuffs have not received an overall and systematic study of their physical and chemical properties, necessary for the exploitation and utilization.

Item Type: Article
Subjects: Engineering and Technology > Other engineering and technologies
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Krsto Blazev
Date Deposited: 13 Dec 2012 13:56
Last Modified: 15 Aug 2013 11:38
URI: http://eprints.ugd.edu.mk/id/eprint/3581

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